Piston for internal-combustion engines



Aug. 25,1925. I f 1,551,233

w. G. BERRY ET AL v PISTON FOR IjNTERNAL COMBUSTION-ENGINES oi inal Filed Sept. 14, 920

I I /7 i? INVEN TOR. W) U z' a m 67567 734 By wry/ Patented Aug. 25, 1925.

UNITED STATES PATENT OFFICE.

WILLIAM G. BERRY AND MAY BERRY, OF CLEVELAND, OHIO.

rrs'ron FOR INTERNAL-COMBUSTION enemas.

'ApplleationilledSeptember 14, 1920', Serial No. 410,264, Renewed June so, 1925.

To aZZw/w'm, it may concern:

Be it known that we, WILLIAM G. Bunny and MAY' BERRY, citizens of. the United States. residing at 1552 Payne Ave. Cleve- 6 land. in thecounty of Cuyahoga and State of Ohio; have invented 'a' newand useful 4 Piston for Internal-CombustionEngines, of which the following is a specification. v v This invention relates to improvements in pistons for internal combustion engines, one

object of the invention being to provide an improved piston which effects an economy combustion motor piston constructed and ar-' ranged in accordance with this invention.

Figure 2 is avertical central sectional 30 view of the same onla plane at rightangles to Figure 1.

Figure 3 is a'transverse sectional view of the same on the plane indicated by the line 3-3 of Figure a In accordance with this tutes a single casting. An aluminum piston thus constructed is very much lighter as well as very much stronger and more durablethan'a piston made, asheretofore, of iron or steel. 1

The head 2 of the piston' is provided withcircumferential grooves 3 for the reception of piston rings, and the skirt or outer end 4: of the piston is also provided with a similar groove 5for the reception of a iston ring. Moreover, the skirt is provide with oblique slits 6 which extend therea'cross so that the skirt isof open-ring formation and invention, the" piston 1 is made of aluminum and. constithe slits or cuts tend to. close'when the piston 1 expands by heat "and hence to a considerable extent neutrahzes the expansion and min1- 'mizes friction between the piston and the,

bore of'the cylinder in which it operates.

The bearings 9 for the pivot pin of the skirt, as shown.

. The head 2 is provided on its inner'side with radial reinforcing ribs 7'which are cast integral with the piston and serve to greatly strengthen the construction of the piston and to enable a considerable economy of material to be effected in the manufactur thereof.

This improved piston is oil-proof, is tight fitting, and saves aboutten per cent-of gasoline or other motor fluid as compared with pistons of iron or steel such as have been heretofore used.

Qur improved piston is oil proof, because it is made to fit tightly in the cylinder, no allowance being required to be made,as in piston are integral with and formed onthe other cylinders. Our piston saves gasoline because it is light and fits tightly in the cylinder.

' Moreover, the expansion is endwise to other pistons, the ribs 8 outside expandingv in length, while other pistons expand sidewise.

'Our piston is free from vibration and it I enables the engine in which it isused to be -run at a higher rate of speed than hereto- I fore.

Having thus. described our invention, we claim A piston for an internal combustion motor.

comprising a head, a-skirt of open ring formation spaced fromthe head,- longi'tudinal ribs arranged in spaced relation and connecting the skirt to the'head, each of said ribs having a longitudinal slot and the openin in the skirt ring extending to the outer en of one of the slots, and bearings for a piston rod pivot formed 'on andcarried by the skirt and arranged in the spaces between the longitudinal ribs.

In witness whereof we atfix our 1 signatures. WILLIAM G. B RRY.

MAY BERRY. 

